Stanford University – Facility Design Guidelines
SECTION 16120
MEDIUM VOLTAGE POWER CABLE
PART 1
1.1
GENERAL
SCOPE
This specification covers type MV-105, single-conductor, copper, medium-voltage (15 kV),
shielded power cable, insulated with Ethylene Propylene Rubber (EPR), shielded and
jacketed.
This cable is intended for use in an underground distribution system. The same cable shall
be used for both 12 kV and 4 kV installations.
1.2
RELATED WORK
Section 16121: Medium Voltage Cable Installation.
1.3
SERVICE
The cable shall be suitable for installation aerially, underground, through direct burial, in
underground duct or conduit, in duct or conduit above ground, in raceway or in cable tray.
The cable shall be capable of continuous operation in wet or dry environments at a
conductor temperature of 105°C in normal operation, 140°C in emergency overload
operation and 250°C in short circuit operation.
1.4
REFERENCE SPECIFICATIONS
The cable shall meet the requirements of the following industry specifications:
1.4.1 Insulated Cable Engineers Association, Inc. (ICEA)
 ICEA S-93-639/NEMA WC74, 5-46kV Shielded Power Cable for Use in the
Transmission and Distribution of Electric Energy
 ICEA S-97-682, Standard for Utility Shield Power Cables Rated 5-46 kV
1.4.2 The Association of Edison Illuminating Companies (AEIC)
 AEIC CS8, Specification for Extruded Dielectric Shielded Power Cables Rated 5
through 46 kV
1.4.3 Underwriters Laboratories
 UL 1072, Medium Voltage Power Cable, Type MV 105
1.4.4 ASTM International
February 2014
Page 1 of 3
2015 FDG Section 16120
Stanford University – Facility Design Guidelines
 B496, Standard Specification for Compact Round Concentric-Lay-Stranded Copper
Conductors
1.5
QUALITY ASSURANCE
The manufacturer shall have a minimum of ten years experience manufacturing MediumVoltage Power Cable and shall submit a user reference list on request.
A. The manufacturer shall ensure the cable core is virtually corona-free by applying the
strand shield, insulation and insulation shield concurrently through a Triple Extrusion
Single-Pass process.
B. The manufacturer of the insulating and shielding material used shall minimize material
contamination by filtering plant intake air and by processing and storing all materials in
sealed containers not susceptible to rust and corrosion. Further, the manufacturing
process shall be entirely computer controlled and employ state-of-the-art mixing and
addition technology to maximize material uniformity.
PART 2
2.1
PRODUCTS
ACCEPTABLE MANUFACTURERS
General Cable - UNIBLEND® (spec 6355)
Okonite – Okoguard-Okoseal type MV-105
2.2
MATERIALS AND CONSTRUCTION
A. CONDUCTOR
The conductor shall be annealed compact stranded bare copper per per ASTM B496.
B. STRAND SHIELD
The strand shield shall be a black extruded semi-conducting thermoset compound
applied directly over the conductor. It shall be free-striping from the conductor and be
uniformly and firmly bonded to the EPR insulation.
C. INSULATION
The insulation shall be a high quality flexible thermoset Ethylene Propylene Rubber
(EPR) compound that is heat, moisture, ozone and corona resistant. The compound shall
be contrasting in color with the strand and insulation shields. The insulation level shall
be 133%.
D. INSULATION SHIELD
February 2014
Page 2 of 3
2015 FDG Section 16120
Stanford University – Facility Design Guidelines
The insulation shield shall be a black extruded semi-conducting thermoset compound
applied directly over the insulation. It shall consist of a material compatible with
insulation and the metallic shield and be free-striping.
E. METALLIC SHIELD AND JACKET
Metallic shields shall be an uncoated helically applied 5 mil bare copper tape with a
minimum overlap of 12.5%, with a PVC or a flame-resistant semi-conducting
Chlorinated Polyethylene (CPE) jacket.
H. JACKET MARKING
The following information shall be printed every twenty-four (24) inches on the outer
jacket:
1. Manufacturer
2. Insulation thickness and type (shielded)
3. Jacket type
4. Conductor type and size (AWG or MCM)
5. Rated Voltage
6. Year of manufacture
G. ENVIRONMENTAL REQURIEMENTS
The outer jacket shall comply with EPA 40CFR, Part 261 for a leachable lead content of
less than 5mg/L using the Toxicity Characteristic Leaching Procedure (TCLP).
PART 3
3.1
EXECUTION
TESTING OF COMPLETED CABLES
Testing shall be done in accordance with the latest editions of ICEA S93-639 , UL 1072 and
AEIC CS8.
END OF SECTION
February 2014
Page 3 of 3
2015 FDG Section 16120